117191849 has 4 divisors (see below), whose sum is σ = 117484500. Its totient is φ = 116899200.

The previous prime is 117191843. The next prime is 117191861. The reversal of 117191849 is 948191711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69139225 + 48052624 = 8315^2 + 6932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117191849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117191843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145724 + ... + 146525.

It is an arithmetic number, because the mean of its divisors is an integer number (29371125).

Almost surely, 2^117191849 is an apocalyptic number.

It is an amenable number.

117191849 is a deficient number, since it is larger than the sum of its proper divisors (292651).

117191849 is an equidigital number, since it uses as much as digits as its factorization.

117191849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292650.

The product of its digits is 18144, while the sum is 41.

The square root of 117191849 is about 10825.5184171475. The cubic root of 117191849 is about 489.3645086746.

The spelling of 117191849 in words is "one hundred seventeen million, one hundred ninety-one thousand, eight hundred forty-nine".